Plug with inner and outer drum

ABSTRACT

The present invention relates to a plug which can be put into holes, especially into drilled bore holes of walls, which plug effects a surprising solid tightening for example in lay brick-walls also in such cases in which the hole or the plug has at least partly sizes and especially varying diameter-dimensions, which do not allow the use of the so-called spread-plugs known in the prior art. The plug according to this invention is consisting in an inner drum preferably in the shape of a pyramid-stump made out of a hard material and in a outer drum made out of extendable material, whereby the outer drum is connected with the inner drum for example by welding.

FIELD OF THE INVENTION

[0001] The present invention relates to a plug which can be put into holes, especially into drilled bore holes of walls.

BACKGROUND OF THE INVENTION

[0002] The present invention relates to a plug which can be put into holes, especially into drilled bore holes of walls, which plug effects a surprising solid tightening for example in lay brick-walls also in such cases in which the hole or the plug has at least partly sizes and especially varying diameter-dimensions, which do not allow the use of the so-called spread-plugs known in the prior art.

SUMMARY OF THE INVENTION

[0003] The present invention relates to a plug which can be put into holes, especially into drilled bore holes of walls which plug effects a surprising solid tightening for example in lay brick-walls also in such cases in which the hole or the plug has at least partly sizes and especially varying diameter-dimensions, which do not allow the use of the so-called spread-plugs known in the prior art. The plug according to this invention is consisting in an inner drum preferably in the shape of a pyramid-stump made out of a hard material and in a outer drum made out of extendable material, whereby the outer drum is connected with the inner drum for example by welding.

[0004] The inner drum is consisting preferably in a hard plastic-material especially in polyamid, the outer plug is consisting preferebly in a soft plastic material for example in a soft polyethylene or soft gum-material.

BRIEF DESCRIPTION OF THE DRAWINGS

[0005] The nature of the present invention is explained further in the attached figures. In these figures preferred examples of the invention are presented.

[0006]FIG. 1 shows the pyramid-stump shaped inner drum made out of hard material:

[0007]FIG. 2 shows the outer drum made out of a much extensible soft material;

[0008]FIG. 3 is a horizontal cut of the presentation according FIG. 1.

[0009]FIG. 4 shows a total picture of the plug according to the present invention whereby the inner drum which carries the reference number 1 is put into the outer drum which carries the reference number 2. The smaller basis area 1 a of the inner drum is tightly connected with the under side area 2 a of the outer drum, for example by glueing or welding.

DETAILED DESCRIPTION

[0010] In the following, the structure and the function of this inventive plug will be described together with the attached FIGS. 1-4, which show a preferred example in detail.

[0011] The plug according FIG. 4 will be put in a bore hole of a lay brick which bore hole is for example some millimeters wider; then a (not shown) plug-screw will be screwed into a canal with a star-like diameter (=star-canal) which has the reference number 3 which plug screw will create a screw-way in the inner drum 1 in which hard inner drum the star canal which carries the reference number 3 is arranged, whereby the both (above mentioned) bases areas are connected. The plug screw is made out of a material which is naturally still harder compared with the material of the inner drum with the consequence, that it is possible to screw the plug screw into the star-canal whereby the screw way is created.

[0012] The screwing that means the producing of this screw way is finished as soon as the plug screw will have reached the end of the star-canal.

[0013] In order to effect that a relative-turning of the inner drum to the outer drum is made impossible, according to a preferred embodiment, at the upper surface area of the inner drum with a smaller diameter (reference number 2 a) there are arranged pegs carrying reference number 4 with heads 4 a, which are going through relative bore holes of the surface 2 a of the outer drum.

[0014] In order to effect the requested very tight hold (support) of the plug according to this invention in a wall-hole or in another plug-hole, now, the plug screw will be screwed further with the following (surprising) effect: The inner drum is carrying out in the outer drum a kind of a back movement whereby by this screw-movement the flexible, soft and preferably “blowing” outer drum will be shortened that means will get a smaller length and contemporarily a rather big enlargement of its diameter with the consequence that automatically in most cases wider plug holes will be filled out and a very tight fixing of the outer wall in the plug hole is effected.

[0015] According to a preferred embodiment the outer drum has ripp-elements carrying the reference number 5 made out of soft material.

[0016] According to a further embodiment the outer drum has a finish plate carrying the reference number 6 which has at its surface a fluting element carrying the reference number 6 a which is put into the under end-area of the ripp elements 5.

[0017] According to a further preferred embodiment the outer surface of the pyramid-stump-shaped inner drum carries a sharp grooving, carrying the reference number 7 which will favour the above mentioned upsetting of the outer drum.

[0018] The fluting outer surface of the inner drum effects during the backward-moving of the inner drum in the outer drum an increasement of the “power-hold” and thereby an increasing of the above described “blowing” of the outer drum. 

We claim:
 1. Plug with inner- and outer-drum, characterized in, that the plug is consisting out of an inner drum (1) made out of a hard material and consisting in an outer-drum (2) made out of a soft material, whereby the inner drum (1) is situated in such a way in the outer drum (2), that the both basis-areas of the both drums situated near to building are tightly connected which each other and that in the inner drum (1) a canal (3) is situated.
 2. Plug according claim 1 , characterized in, that the inner drum (1) has a shape of a pyramid-stump.
 3. Plug according claim 1 -2 characterized in, that on the basis area of the inner wall nearer to the building there are arranged pegs (4), which extend through bore holes situated in the upper end-area of the outer drum (2).
 4. Plug according claim 3 , characterized in, that the pegs (4) are carrying ball-like heads.
 5. Plug according claim 1 -4, characterized in, that the outer drum (2) ripp-elements (5), which do cooperate referring to a building with the outside lying rectangular basis-area (6 a) with a finish plate (6).
 6. Plug according claim 1 -5, characterized in, that the canal (3) is a canal with a star-like diameter. 